Paper-bag machine



- Oct. 25, 1927.

H. BURGDORF PAPER BAG MACHINE Filed 'July 5 1926 '7 Sheets-Sheet 1 ATTORNEYS .'H. -BURGDORF Filed July 5. 1926 '7 Sheets-Sheet 2 M 151 w l m v j A M i n i 0 Q1. 2 f 0 i FPAPER BAG MACHINE 6W M: 113 m 9 0w 7 6 i w :1 M 4 F v mfi M 2 I 164657 H,BURGDORF f P'APEYR BAG mcnma' FiIed July 5. 1926 7 Sheets Sheet- 3 v JPINVENTOR ATTORNEYS Oct. 25-192 7 HLBURGDORF PAPER BAG MACHINE Filed July 5. 1926 i SheeQs-Sheet 4 NW mm mm wm MW w [P l m p I -1: I- i 1 i l lw wlllul| flvlrlL INVENTOR vz g ATTORNEYS Oct. 25. .1927. 1,646,572

H. BURGDORF :PAPBQ BAG MACHINE Filed July 5. 192a '7 Sheets-Sheet 7 INVENTOR with respect-tothejmain frame.

. .Fig.,2 is a plan view of the feeding stage mechanism and its position with regard to the main frame of the machine. 1

Fig. 3 is a perspective view illustrating the type of composite sheet from which the bag is made.

Fig. 4 is a sectional view of the mechanism of the tube forming stage taken on the line 4-j4'ofjFig. 6. 3

Fig. 5 represents a side elevation of the main frame of the machine with the tube forming mechanism at one end and the bottom forming mechanism in phantom at the other end.

" Fig. 6 shows an axial section of the tube forming mechanism and itsposition with regard "to the bottom forming mechanism which is shown in phantom. V

' Fig. 7 is a perspective view of the bellowssided tube formed by the tube forming mech .anism. 1 :Fig. 8 is'an end elevation of the tube forming mechanism and the main frame.

Fig. 9 is an elevation, partly, in section, along 9-9 of F ig. 6, of the removal mechanism. v

The bed or main frame 1-. of the machine (see Figs. 1 and 5) carries the tube forming and bottom forming mechanisms, and is of a size and shape suitable for the intended purpose; The auxiliary frame mounted at right angles to the main frame and carrying the feeding mechanism is shown at 2, Fig. 1.

1 The main drive shaft '3 (see -Figs.' 5, 6 and 9) is journaled in suitable bearings in themain frame, and drives a power shaft 4 through bevel gearing 124. The power shaft 4-, through various gears and cams mounted'uponit', drives the feeding and tube forming mechanisms. 7 The bottom forming r from 'themain drive shaft 3.

mechanism and the removal mechanism to the bottom forming stage are driven directly The feeding end of the machine,'shown in section in Fig.1 and plan in Fig. 2, has an inclined receiving table 5 adapted to re ceivethe composite sheets 6 (Fig. 3) from which the bags are made. These sheets consistof one sheet of-waxed paper overlaying a sheet of heavy bag paper with the longitudinal edges of both glued'together along the-dotted lines shown in the figure and the transverse edges overlapping. Inasmuch as the preparation ofthese sheets does not form part ofthis invention, it is not deemednecessary to show or describe in detail the manner in which they are formed.

through the gears 116, 117, 118, 119 and 120 is a shaft 8 (Fig.2) carrying a pear-shaped cam 9 connecting with a roller 10 on a bifurcated arm 11 totransmit motion through an adjustable rod 12 and a crank arm 13 to a rock shaft 14 mounted in hearings in the frame 2.- Secured to the shaft 14 are two adjustable arms 15 carrying at their outer ends an auxiliary cross shaft '16. Mounted upon the cross shaft 16 is a plate 17 pro: vided withtwo felt strips 22 and a crank arm 18 carrying a roller 19'so coacting with an extension arm 20 fastened to the frame. l as to hold the plate 17 in vertical position against the action of a spring 21.

When the arms 15 carrying the plate '17 are in the position shown in Fig. 1, the felt strips 22 are in contact with one surface of a glueroller 23 mounted torotate in a glue container-24. A ratchet 32 secured to the roller 23 is actuated by a pawl 33 pivoted to the frame member 2 and held in engagement with the ratchet by a spring 34. The contamer 24 is set upon uprights 25 which are mounted upon a rock shaft 26. A crank'arm 27 secured to thisshaft carries a roller28 contacting with a cam. 29 mounted upon the shaft 8.

The spacing of the cams 9-and 29 upon the shaft 8 such that their transmitted.

motion is practically simultaneous. Cam 29 actuates the rock shaft 26 through the roller 28 and the crank arm 27. The turning of the shaft rotates the uprights 25, to the left against the action of a spring 31. and moves the glue container 24 away from contact with the felt strips 22. The moven'lent of the container 24 and the glue roller 23 to the left causes-the ratchet 32 to lock against; the pawl 33 with the result that another face of the roller is rotated into position ready-for contact with the felt strips 22.

At the same time that cam 29 is acting to move the glue roller to the left, the cam '9, through the roller 10 on the arm 11, is

transmitting motion, against the action of a spring 30. to rock the shaft 14 by way of the rod 12 and the crank arm 13. of the shaft 14 moves the arms 15, carryin the plate 17 with the felt gluing strips 22,

This motion from the full line to the dotted line post- 22 rotates into contact with the paper under the action of the spring 21. Furthermovement of the cams 29' and 9- brings back. the glue container and the arms 15 to their or1g1- nal position and the felt strips 22 contact 42 is held to the cam under the pressure of a spring 44 acting upon a pivoted link 45, which is pinnedto the link 41 at the roller 42. 'As the shaft8 rotates, the cam 43' actuates the link 41 through'the'roller 42 to cause the stop 7 to pivot and dropout of engagement with the lower edge of the paper; Asthe stop-"7' dropsoutof the way.

the paper is moved forward by a suction cup 35, contacting with theunder side of the paper through slots inthe table 5. The cup is pivoted to the rnd of a curvedarm 36 mounted upon a rock shaft 37 gournaled in bearings in the frame 2. A long link 88, pinned at one end 39"to the gear 119, piv- 'otally connects with an admstable crank arm I 40 to transmit motion to the shaft 37.

' 'After the other gears and cams have op--' after. rotating the cam 51 through 90.

erated to apply glue tothe paper and rotate the stop 7 out of engagement with the lower edgeof the sheet,-the motion of the gear 119, through the link 38 andthe crank arm 40, rocks the shaft 37, and the arm 36cmries the suction cup with the paper held. to it, to the position 'shown in'the dotted transmit to them a reciprocatory in-and-out E motion produced by the rotation of-a cam. -59 actuating the rollers 56"against the ac- 7 tion of springs 74 (Figs'tl and 8.) I

v The cam 59, mounted for free rotation link 60 (Fig. 8) connecting with one, arm 61 of-acbell:crank combinationpivoted to a studon .a-bracket 62 fastened tothe main frame 1.1? The other arm '63 of the bell crank combination has motion transmitted to it through a roller=64 riding .under tensionof a: spring 65 on a cam 66 mounted on/the power shaft 4. 1

Mounted on asecondary shaft 67 which is driven by the power shaft 4 through the gears 116 and 117. (Fig. 6), is a'cam 68 "carrying a stud 69 sliding in=the guide slots of a four arm plate cam 51 (Fig. 8). With each rotation of the cam 68, the stud 69 engages one arm of the plate cam 51 and rotates-the shaft 46 through-90. A pivoted bell crank 'lever '70,ha'ving-one arm carryinga roller71 sliding in the guide slotsof the plate cani51 and the other arm carrying a? roller 72 ridingon the plate cam 51 underactionofa spring 7'3, is adapted to lock the-plate cam 51 in position when the about the shaft 46. is actuated by a pinned v stud 69 onthecam 68'leaves the guide slots" I connected to al bifurcated arm 76 carrying :1

lines of Fig. 1 where the paper is taken up by the tube forming mechanism.

I Parallehwith he power shaft 4" and mounted some distanceabovethe bed 'of'the frame- 1 J'sasectional shaft divided at "ltS -m idpoint intothe two sections 46 and 47 "(Fig 6). Bothsectionshave'their outerends ejournaled in suitable bearings. one in across brace 48, the other in struts 49 forming part of the main frame '1, and their inner ends socketed one within the otherat'50t0 perm -of their independentrotation.

Section 45 of the shaft is actuated bya haveth'eir corresponding ends freejbut are; 60

so adapted at their other ends as to bei rarods 57 slidablcin collars 58 formed on the, 'd1sk 52, are securedto the plates and i bell crankcarries shouldered finger 82 e xtendingthe length; and directly adjacent one edge ofthe stationary 'pla-tes53. The other arm carries a-rroller .83,"which rides onv thecamBO under action of a spring 84'. =As

dotted position"(Figl}1)*, by the'suction-cup 35 ;fone ofthefingers82 is moved upward, I v I under action of the cam '80"on one of the ing plates 53- and54 (F ig. 4), each ofvery -i 'shallow-T section"; asbest shownFig. 1.

The-plates 53 are firmly fixed at one end "-to -the' disk 52 and have their other ends; free andai-nsupported. The plat-es'54i-also roller 77 riding under action of a spring shaft 4: 1 a

a {cam :80 actuating four bell 4), pivoted to the disk 52. One arm .of eac the-disk 52"rotates, carrying the crank arms with-iit, thecam 80ximparts' a rocking mo-l As the sheet G is moved forward into tne rollers 83, to i turn; over and clamp one edge while, ig acting on 'the'rollers 56 (Fig 6),

to hold theplates 54 in the outer-position *With the paper thus firmly held,

.the disk52 is rotated 90 the stud- 69Iaet- ,m on jth"e four arm' plate cam 51? After therotation, the roller '71 onthe bellcrank flevejr 70 (Fig; 8). dropsback into the guide slot on one armiofthe four arm' plate 'camf51 l and'locks the disk? 52 against fu-rtherr'ota tion" to 'the 'jrollers 83; which causes the fin- 'gers 82- to'move into and out of contact with p v gone edgeof the plates 53.1 .f

'fourarm plate cam 511and carries a" circular disk 52. Equally spaced about the circumf =f-erence of the disk 52 and extending later ally are four setsoftwo rectangular form-fi one end 86, under action of a spring 121, to

one arm .87 of a bell crank pivoted to a cross brace of the main frame 1 and carrying a roller 88 riding under tension of a spring 123 against acam 89 mounted on the power shaft 1. The arm 87 of the bell crank has extending laterally the length of plate 53 a long bar 90-(best shown in Fig. 5).

lVith the, actuation of the bell crank 87 and the linked plate 85 by the cam 89 against the roller 88, the extending portion of the paper (shown heavily dot-ted in Fig. 4) is bent upward and around the top of the plate 53 by the plate 85 until the previouslv.gluededgesoverlap the edges still 7 held clamped by the finger 82. ,Bar 90 then slides over the lapped edges and firmly presses them together. .The position taken by the plate and bar at the end of this operation is shown in lightly dotted lines in Fig. 1, The stud 69 on'the' cam 68 (Fig. 8) then again engages the four'arm plate cam 51 and rotatesthe disk52 another 90 to the position shown in Fig. 1.. The finger 82 still clamps the edge of the paper which. has-now become a rectangular tubeand the cam 59 still holds the plates 53 and 5 1 in the separated position.

Mounted upon, and adapted to slide back ,and forth in a dove-tailed, groove in an extension of the mainframe 1, is a slotted upright 91 (Fig. 4;). A cam 92 on the power shaft l transmits motion to. a roller 93, carried by a pivoted arm 94 mounted on the same hub witha bifurcated arm 95 contacting with astud 96 in the base of the upfright91, to produce a back and forth movement of the uprightagainst the action of a spring 97.

Corresponding with the motion of the cam 92, a cam 98 on the power shaft 41' con- .tacts; with a roller 99 carried at one-end of a pivotedlever 100, to producea rocking motion of the lever against the action of a spring 122. Mounted on the same 'pivot as thelever 100 is a lever 101 connected to a longharm 102 havingea fixed extension 103 and a. pivoted link 104. Eollers105 and 106 carried by the ends of the extension 103 and the link 104, contact with the inner edges; of the legs of horizontal T-shaped jsliding bars'107 mounted for vertical move- Carriedat the ends ofthe legsg107 and extendingthe length of theplates 53 and 54 are a pairof narrow vertical plates or tucking fingers 108 (Figs. 2 and 4).,

Thus the rocking motion of the'lever 100 acts upon the extension 103 and the link 101 through the lever 101 and the arm 102 to produce a reciprocating motion of the two sliding bars 107 in opposite phases against paper on opposite sides. Simultaneous with this action of the tuckingtfingers, the cam 59 operates to bring the plate 54: inward toward plate 53. The rectangular tube'is thus collapsed upon itself under the combined action of the tucking fingers 108 and the coming togetherof the plates 53 and 54, to form a bellows-sided tube .as shown in Fig. 7. The tucking fingers 108 then separate, and the upright 91 moves backward, at the same time that the shouldered finger 82 is released by the cam 80 and the disk 52 rotated another 90 carryingthe plates 53 and 5st to the next or top position (Fig. 4).

The bellows-sided tube held between the closed plates 53 and 54 is now in position to be withdrawn from theplates and moved forward to the bottom forming stage (Figs. 5 and 6).

Mounted in side frames v110- forming. part i bottom forming stage and the gears 113 and 1141 mounted in the side frames 110. (Figs.

5., 6 and 9.) vA's. thesegmental gripping rolls 111 come together underaction of the gears 113 and 11 i, they grip the'end, of the bellows-sided tube; on top; and bottom through slots 115 out in the. ends of the plates 53 and'5 l' (Figs. 2 and 5), pull the tube 011' the closed plates, and feed the col- .115 lapsed and folded-tube to the frolls'of the next stage (shown in phantom inFi-gs. 5

and 6), where a satchel bottoinis for-med and the tube ejected as a completed baggy By utilizing my invention, ,it'ispossible tov make withlgreat facility'paperrtubes of the type commonly nsedinf making paper -bags,andthis can be'accomplished' by means .of a machine which occupies much-less space than the machines ordinarily used-forsimrlar purposes- My improved machine is-not .expenslvej to manufacture. and. no great amount of skill is required 1n order tokeep the machine in good-running condition.

,' It is to be understood that my invention I is not limited to the particular embodiment illustrated and described, but includes such modifications thereof as fall-Within the scope ofthe appended claims. For example, many of the novel features can he employed-in combination-s other than the particular com binations illustrated and described, and'some oft-he features may even be eliminated Without sacrificing .all of the advantages of my invention.

I claim; v

1. In a machine for; making paper-bags,

for feeding individual sheets, rotatable means for forming bellows-sided tubes fromsaid individual sheets, and means for removing the completely formed bellowssided tubes from saidtube-forming means.

2. In a machine for making paper bags, means for feeding individual sheets,,rotatable means for formingloelloWs-sided tubes from said individual sheets with their axes perpendicular to the line of feeding, and means vfor removing the completely formed bellows-sided tubesfrom said tube-forming means. l In a machine for making paper bags, means for suction ally gripping the bottom surface of and feeding individual sheets, means for forming bellows-sided tubes from said individualysheets With their axes per pendicular to the line oft-ceding, and means able means for forming bellows-sided tubes for removing the completely formed bellows- .sided tubes from said tube-forming means. {kiln a machine, for making paper bags, means for feed ng "individual sheets, rotatfromus'aid indivi dnal'sheets with their. axes perpendicular to the, line ofifeedlng', and means tor removing the completely formed bellows-sided tubes from, said tube-forming means in a direction parallel to the axes of the tubes.

5- In a machine for making paper bags.

- means for forming bellows-sided tubes from individual sheets,- said means including circularly mounted plates,flm eans for feeding individual sheets to said circularlymounted plates, and means for removing the completely formed bellows-sided tubes from said circularly mounted plates.

6. In amachine for making'paper bags, means for applying glue tooneend of indi.- vidual sheets, mean sgfor feeding said individual sheets, rotatable means for forming hellowsesided tubes from said individual sheets with their axes at right'angles'tothe line of feeding, and means for removing the completely formed bellowssided tubes from said tube-forming means. a 1 f l '1'. In machine for making paper bags,

means "for momentarily arresting the for I 'Wardmovementoit individual sheets, means for applying glue to oneend ofsaid indi vidual 7 sheets (hiring the period" of rest, means, for feeding said individual-sheets,

means for forming hollows-sided tnhes'fiom said'individual sheets, .andmeansfQr remov ing '.the-. eompletely termed;bellows-sided t-uloes from said tube-forming: means, 1 8,' lnjajmachine JfQr mak ng paper 'bags,

means for momentarily arrestingjthe for- Ward movement of individual sheets, means tonapp-lymg glue "tonne-end ofsa d individual -sheets a during period;- of" rest,

means, ,for said'individual sheets, saidq arresting, gluing and feeding means operating infpart simultaneously and-in part 5' successively, means; ton/forming bellowsided tube frem said "individual sheets 7 With the r axes at right angles to -:the line of teed? ing, and means for removing the completely formed helloyvssided tubes from said tube l'ormingmeans f g i 1 ,9, In a machinefor making paper-bags, means for feeding individualsheets, mean-s v toriorm mg rectangular tubes from, said in I dividual sheets with their axes perpendicular to the line of feeding, means for tuckingtwo opposite sides' of the formed rectangular tubes, means operated simultaneously with said tucking means for co llapsing upon each other the other twosides of said formed rec? Q I tangular tubes to term hellows-sidedjt-uhes,

and means for-eremoving the j completely formed hellows-sidedtuloes from saidjtubce forming, i v to. the line of feeding.

name a d ct en. P PI S1i 1 .1'0.; In a machine for making; I

means for advancing; individuals;sheets,

mea'ns for securing ,one end-of said individ- .ual sheets, meansforbendi g; said indiw v dnal sheets to form two sides of a! rectangular tube, means for :zturth'er bending sai -d. individual sheets to formtheiother'two r 7 other two sides ofsaid formed rectangular tithes-to form bellows-sided tubes, andfmeans tor removing the completely formed ba ms sidedtuhes from said tube-forming means; i

llfIna'machine for making. paper hags f V from individual sheets, a paper feeding mechanism comprising an inclined table down wh ch sheets may-slide ibyvgravity, a pivoted stop for engaging one edgeglofa sheet to 'arrestits sliding movement, a1i.d a reclprocat ng ;clev1ce-- for engag ng a sheet and movingit longitudinally aftuheforming device, a

mechanism comprising. an incli1 1ed table down which sheets may, slide .gravity;,";

'amachine for v i from ,individnal sheets, a paper, feeding v pivoted stop for engaging .one edge eta sheet to anrest its sliding movement, oscillating means foir ap'plying glue to one end ,of a sheet, 1and a recipr ocatin d fo ngag;

ing a sheet and moving it. longitudinally; to-

ward a tube-forming device.

13; In a machine for maklng paper bags from, individual sheets, mechanism comprising an inclined table down which-sheets may slide by gravity, a pivotedstop for engaging onefedge of asheet to arrest its sliding movement, said stop being mounted on said tableto engage thelower edge ofa sheet, os-

- cillat-ing means for applying glue to'one end of a-sheet,and a'reciprocating device for engaging a sheetand moving it longitudinally toward'a tube-forming device. i

14:. In a machine for making paper bags from individual sheets, a' paper feeding mechanism comprising a slotted inclined forming device.

table down which sheets may slide by'grav: ity, a pivoted stop for engaging one edge of a sheet to arrest its sliding movement, and

a reciprocating device moving in said slot for engaging "the under surface of a sheet and moving it longitudinally toward 'a' tube- '15. Ina machine for making paper bags from individual sheets, a paper feeding mechanismcomprising an inclined table down which sheets may slide by gravity, a

pivoted stop for engaging one edge of asheet to'arrest its siiding'movement, and a suctionally gripping device for engaging a sheet "and moving it longitudinally toward a tubeforming device. I

. 16. In a'machine for -making paper bags fromindividual sheets, mechanism comprising'an'inclined table down which sheets may slide by gravity, a pivoted. stop for engaging one edge'of a sheet to arrest its sliding movement, oscillating means for applying glue to one'end of a sheet duringthe periot of rest, and a reciprocating device for engaging a sheet and moving it lQngitudinallytosheet after the period of rest and moving -it longitudinally toward a tube-forming device. p

18. In a machine for making paper bags 7 from individual sheets, mechanism compr1singv an inclined table down which sheets may slide by'gravity, a pivoted stop for engaging one edge of a sheet to arrest its sliding movement, oscillating means for applying glue to one endof a sheet, said means comprising an oscillating arm contacting alternately with a glue supply :andwith a sheet on said inclined table, and a reciproeating device'fo'r engaginga sheet'a fter the :i 5",6"4 gluing operation and moving it lOnglttlClk.

nally toward a tube-forming'device.

. 19. In a machine for making paper bags ,n'iechanisni tdf'old said individual sheets about said plates.- r

20. In a machine for making paper bags from individual sheets, mechanism for forming a tube comprising a rotatable member, a pair of plates, one fixed and one movable, mounted on said member, a'paper holding member mounted on said rotatable member and means cooperating with said mechan-ism to fold said individual sheets about said plates. v

21. In a machine for making paper bags from individual sheet mechanism for forming tube comprising a rotatable disk, a pair of plates, one fixed and one movable, disposed adjacent to the periphery of said disk, a paper holding, member pivoted to said disk and means cooperating with said mechanism to fold said individual sheets about said plates.

22. In a machine for making paper bags from individual sheets, mechanism for forming a tube comprising a rotatable disk, a

pair o'fsuperposed plates,'one fixed and one movable, mounted to extend axially from the'periphery of said disk, a paper holding.

member mounted on'said disk and extending along one edge of saidfixed plate" and means cooperatingwith said mechanism to fold said individualsheets about said plates.

23; In a machine for making paper bags from individualsheets, mechanism for forming a tube comprising a rotatable disk, a pair of superposed rectangular plates, one

ment, mounted to extend'axially. from the periphery of said disk, a paper holding member adapted to move into-and out of contact with said stationary plate and means cooperating with said mechanism to fold said individual sheets about said plates. I i

24. In amachine'for making paper bags from individual sheets, mechanism for forming a tube comprisinga rotatable disk, a pair of radially spaced rectangular plates, one stationary and one movable, mounted on said disk, a paper holding member for engaging a sheet and holding it against one edge'ot said stationary member and means cooperating with said mechanism to fold said individual sheets about said plates. 25. In a machine for making paper bags from individual sheets, mechanism for forming a tube comprising a rotatable disk, a pair of radiallyspaced rectangular plates, one stationary and one movable, mounted on said disk, said plates being adapted to move stationary and one adapted for radial movemasses,

into and turd-f contact with each i tat-r, a; paper hold ng member co-extensive with said stationary plate for engaging a 7 sheet and I holding itagain'st one edge 'of said station.-

my plate'and means: cooperating with said mechanism" to i told said nd vidual sheets collars formed-,on onefaceof said disk, a paper holding member for engaging a sheet and bending one "end thereof around one edge of said stationary plate and means cooperatingwith said mechanism to fold saidindividual sheets about said plates. 7 In machine for making paper bags from individual-sheets, mechanism for forming a tube comprising a rotatable disk, a pair of radially spaced rectangular plates, one fixedly and one movably mounted onsa-id disk, :1 paper holding member adapted to engage a sheet and bendone'portion thereof. around one edge of said stationary plate and 7 hold anotherportion againstone edge'of to fold, said individual sheets about said bothplates to bridgelthe space 'therebetvveen andmeans cooperating with. said mechanism plates. i

' 28.-'In-a"machine for making paperbags' from individual sheets, a tube-forming device comprising ,a rotatable disk, :a pair of radially spaced: rectangular. plates mounted on said disl'na paper holding member adapt ed to bend one portion of a sheet around one edge of one of said plates and to hold another portion against one edge of both plates 1 vice comprising a rotatable disk, a pair of to bridge the space therebetween, and a tube closing mechanism comprising a pivoted bending plate and a pivoted pressing bar.

'29. In a machine for'making paper bags from indlvldual sheets, a tube-forming deradially spaced rectangular plates mounted on said disk, a paper holdingmember adapted to hold one portion of a sheet around one 'corner and along one side of said separated plates, and a tube closing mechanism comprising a pivoted bending plate for bending another portion of sald sheet around an-' other corner and along another slde of said separated plates, and a pivoted pressing bar. 30. In a machine for makingpaperbags from individual sheets, a tubeforming device comprising a rotatable disk, a pair of radially spaced rectangular plates'mounted on said disk, a paper'holding member adapt-r ed to b lid and hold aportion of a sheet along two sides of said-separated plates, and a tube closing mechanism comprising a pivoted bending plate adapted to bend and hold for making paper bags from individual i sheets,

the-remaining portion of saidlslieet the.

remaining s-ide of said separated plates to form a closed tube, and a pivoted pressing bar adapted to PBSS and seal. the meeting edges "ofsaid sheet;

comprising a movable upright, tuckiingers carried at the end of reciprocating members:

slid'ablein' said upright-,and means for bring mg said tucktingers together.

from individual sheets, a device for. form ng bellows sided tubes tromjj'rectangiular tubes,

comprising anupright movable toward and away from a tubedormmg mechanism, tuck .131. In afmachine iorm aking paper bags" fromnd vidual sheets, a device for forming bellows-sided tubes from rectangular tubes,"

32, In a machine for making paper v fingers carried attheend's'of reciprocating;

members slidable in said upright tor'engagin o osite sides of av rectan "ular tube mounted onysaid tube-forming meclranism and means for simultaneouslybringing said tuck fingers together and movingsaidnpe; right toward Said tubeeforming Inechanism.:

33.111 a machine for, making paper bags mechanism, .c'omp'ri sing a pluralityiofgrip! ping rollers adapted to contact. With/21 'tfube mounted on a tube-forming device to re move the tube inian axial direction,

In a rnachine for making paper bagsa I tube removing from individual sheets, 7 a 7 tube removing mechanism, comprising a plurality of op posed segmental gr1pp1ng-'-,,rol.lers adapted to to remove the tubefitrom the device.

1 35. InamachineL-for makingpaper bags, 1

mechanism for forming tubes from indi-' vidual sheets, comprising a rotatable disk, a plurality of stationary and movable plates mounted thereon, means for rotating said disk ninety degrees at a. time, means for locking said disk in position after each rotation, and -means cooperating With-said Inechanismto fold said individual sheetsabout said plates.

36. Ina machine for making paper mechanism for forming tubes from individual sheets, comprising a rotatable disk; a plurality of stationary and movable plates mounted thereon, means for moving said plates into and out of contact; mounted on said disk, means for rotating said disk ninety degrees at a time, means't-or locking said disk in position after each rotation, and

means cooperatingwith saidmechanismto' fold said individual sheets aboutsaid plates; I

37.Q In a machine formaking paper bags, a device forformingtubes from individual sheets, comprising a rotatable, "disk, plurality' of stationary" and gmovable plates mounted thereon, a plurality; of paper holding members also mounted thereon, means r for successively moving said diskinto posicontact on top and bottom.=vvith oneiend ot 1 a; tube amounted on tube f orming device,

tion with a feeding mechanism to receivev a sheet, into positionwith a tube closing mechanisin-to form said sheet, into a closed tube, into: position with a bellows-sidedtubeforming mechanism to collapse said closed tube to form a bellows-sided tube, and into position with a tube, removing mechanism to remove said bellows-sided tube, and means for loeking said disk in each of said ,positions. 7 i r g 38. A method of making paper. bags from individual sheets, which comprises feeding theindividual sheets to a set of rotating forming plates, formingtlie sheets into bellows-sided tubes with their axes perpendicular to the line of feeding, removing the tubes from the forming plates, feeding said tubes to a bottom forming machine, and forming bottomson said tubes. I

.39. A method of making paper bags from individual sheets, which comprises applying glue to one edge of the individual-sheets,

feedingthe sheets to a set of rotating form'- ing plates, forming the sheets into bellowssided tubes with their axes perpendicular to 'theline of feeding, removing-the tubes from the forming plates, feeding said tubes to a bottom forming machine, and forming bottoms 'onsaid tubes.

40. A method of making paper bags from individual sheets, which Comprises feeding individual sheets to one of a plurality of sets of rotating forming plates, forming the sheets into rectangular tubes with their axes perpendicular tothe. line of feeding, collapsing the rectangular tubes to form bellows-sided tubes, removing the tubes from the forming plates, feeding said tubes to a bottom forming machine, and forming bottoms on said tubes.

1 41 A method of making paper bags from individual sheets, which comprisesfeeding individual sheets to one of a plurality of sets of rotating forming plates, forming the sheets into bellows-sided tubes with their axes perpendicular to the line of feeding,

42. A method of making paper bags from f individual sheets, which comprises feeding individual sheets to one of a plurality of sets of forming plates mounted on a disk rotating about an axisperpendicular to the line of feeding, forming the sheets into bellows-sided tubes with theiraxes parallel to the axis of the disk, removing the tubes from the forming plates in a line parallel to the axis of the disk, feeding said tubes to a bottom forming machine, and forming bottoms on said tubes.

A method of making paper bags from individual sheets, whichcomprises suctionally feeding individual sheets to one of a plurality of sets of forming platesmountedv on a disk rotating. about an axis perpendicular to the, line of feeding, forming the sheets duringhalf a revolution of the disk into bellows-sided tubes with their axes perpendicular to the line of feeding, removing said tubes from the ends of the forming plates, feeding said tubes to abottom forming machine, and forming bottoms on said tubes.

In testimonywhereof I aflix my signature.

, HERMAN BUR'GDORF, 

